Trader consensus reflects an 84% implied probability against NATO invoking Article 5 before 2027, driven by the absence of any armed attack on alliance territory since Russia's 2022 Ukraine invasion, which does not qualify as Ukraine remains a non-member. Recent dismissals, such as NATO Secretary General Jens Stoltenberg's March 2026 statement ruling out invocation over a ballistic missile intercepted near Türkiye, underscore the high threshold requiring consensus on a direct assault. Enhanced deterrence—including Finland and Sweden's 2023-24 accessions, bolstered eastern flank deployments, and new 5% GDP defense spending pledges by 2035—has contained risks without escalation. U.S. pressure for European burden-sharing by 2027 adds alliance strains but no invocation triggers, with historical precedent showing Article 5 activated only once post-9/11.